	var departureMap = new BMap.Map("departureContainer");
	departureMap.centerAndZoom(new BMap.Point(116.404, 39.915), 15);
	departureMap.addControl(new BMap.NavigationControl());
	departureMap.addControl(new BMap.ScaleControl());
	departureMap.addControl(new BMap.OverviewMapControl());

	function departureIPAddress(result) {
		var cityName = result.name;
		departureMap.setCenter(cityName);
	}

	var departureCity = new BMap.LocalCity();
	departureCity.get(departureIPAddress);

